3,4-alkylenedioxy-thiophene copolymers

US6995223B2 · kind B2 · utility

Assignee

• Agfa-Gevaert NV · BE

Inventors

• Bert Groenendaal · Sinaai, BE
• Frank Louwet · Diepenbeek, BE

Key dates

• Filing date: Dec 17, 2002
• Grant date: Feb 7, 2006
• Expiry date: Dec 27, 2022

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C09D165/00
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

An aqueous dispersion of a copolymer of at least one 3,4-alkylenedioxythiophene compound with a solubility in water at 25° C. of less than 2.2 g/L with at least one 3,4-alkylenedioxythiophene compound with a solubility in water at 25° C. of at least 2.2 g/L and a polyanion; a preparation process therefor; its use for coating; a printing ink containing the aqueous dispersion; an electro-conductive layer containing a copolymer of at least one 3,4-alkylenedioxythiophene compound with a solubility in water at 25° C. of less than 2.2 g/L with at least one 3,4-alkylenedioxythiophene compound with a solubility in water at 25° C. of at least 2.2 g/L and a polyanion derived from an aqueous dispersion thereof; and an antistatic layer containing a copolymer of at least one 3,4-alkylenedioxy-thiophene compound with a solubility in water at 25° C. of less than 2.2 g/L with at least one 3,4-alkylenedioxythiophene compound with a solubility in water at 25° C. of at least 2.2 g/L and a polyanion derived from an aqueous dispersion thereof.